Dipper for excavating machines



June 3, 1924.

E. s. BLACK DIPPER FOR EXCAVATING MACHINES Filed May 5. 1923 Inlfefi MS. M,

atented June 3, 1924:,

EDVARD BLACK, OF CHICAGO, ILLINOIS, JKSSIGNOR TO INLAND ENGINEERING COM- PANY, A GOREORATION 0F ILLINQIS. i

DIPPER FOR EXCAVATING MACHINES.

Application filed May 5,

T 0 all whom it may concern:

Be it known that I, EDWARD S. BLACK, a citizen of L116 United States, residing at Chicago, in the county of Cook and State Of Illinois, have invented certain new and useful Improvements in Dippers for Excavating Machines, of which the following is a specification.

My invention relates to clippers for excavating machines, and it has for its principal object the provision of a new and improved form and arrangement of connections for the power cable by which the dipper is given its operative horizontal swing ing stroke below the beam by which it is supported. 7

It is the object of my invention to improve devices of this type in sundry details hereinafter pointed out.

The preferred means by which I have accomplished my objects are illustrated in the drawing and are hereinafter specifically described. That which I believe to be new and desire to cover by Letters Patent is set rorth in the claims.

In the drawing:

Fig. 1 is a side view of a dipper embodying my improved construction.

Fig. 2 is an enlarged detailview, being substantially a section taken on line 2-2 of Fig. 1; and

Fig. 3 is a viewsimilar to Fig. 2, but showing a modified form of construction.

Referring to the several figures of the drawing, in which corresponding parts are indicated by the same reference characters, 10 and 11 indicate the side plates of a dipper, having lugs 12 formed integrally thereon for (fonnection with the horizontally pivoted link by which the dipper is supported from a horizontally pivoted beam (not shown). A door or gate 13 is pivotally mounted on the dipper by means of arms 14 for closing the rear face of the dipper. Inasmuch as these parts may be of any approved form, it is believed to be unnecessary further to describe them herein.

Upon the outer face of the side plates at each side of the dipper, there is provided an car 15 having an opening in its upper end in alignment with an opening in the plates 10 and 11 for receiving the pin 16 by which the bail of the power cable is con- 1923. Serial No. 836,847.

nected to the dipper. These cars 15 are secured in position by means of rivets 17 on opposite sides of a strengthening rib 18. Inasmuch as the entire stress of the power for giving the dipper its operative movement longitudinally of the beam for scooping up a load of material comes upon these cars 15, it is very important that these cars shall have a very strong connection with the dipper. To this end I have provided a lug 19 on the inner face of the ear 15, for engaging a suitable opening through the plates 10 and 11 forming the sides of the dipper. By means of this lug formed on the ear directly opposite the rib 18, the greater portion of the side strain is removed from the rivets 17 being taken directly by the lug.

Inasmuch as these connections are subjected to exceedingly heavy stresses, it will be appreciated that this expedient is ot'very considerable importance, serving to increase very materially the efiective life of the rivets 17 and serving thus to increase very materially the efliciency of the machine as a whole by cutting down the time during which the machine is out of commission by reason of the necessity for repairs.

In Fig. 3, I have shown a modified form of construction, in which a lug 20 is employed .at the lower end of the ear, in lieu of the lug 19 in the form of construction shown in detail in Fig. 2.

By the use of my improved construction, in which the lug 19 or 20 passes entirely through both of the plates 10 and 11, a very strong and effective connection is provided, which. is capable of standing up under very heavy usage for a long period of time.

While I have shown my improvements in connection with a dipper for a steam shovel, it will be understood that I do not wish to be restricted to this particular form of device as distinguis hed from a drag bucket or other similar construction, and my claims are to be construed accordingly.

I claim:

1. In a dipper. the combination of a plate and an ear secured thereto, one of said parts being provided with a projecting lug extending through an opening in the other part for taking the greater portion of the stress applied to the plate through the ear.

2. In a dipper, the combination of a plate, an ear secured thereto, and a projecting lug formed integrally With the ear on its inner face and extending through an opening in the plate for taking the greater 5 portion of the stress applied to the dipper throu h the ear.

side plates at each side thereof, an ear secured thereto, and a lug on said ear extending through a suitable opening through both of saidtplates for taking the greater portion of the stress applied to the plate through the ear.

EDWARD S. BLACK. 

